www.faostat.fao.org/site/591/default.aspx, IRIN "CONGO: Disease devastates cassava crop, threatens widespread hunger". Plant breeding, and therefore crop improvement, depends on genetic variation. Now a days phosphorus and nitrogen (1:2/3) are also applied to the soil. Join now. Corporate Author: Ebook Central Academic Complete., ProQuest (Firm) Other authors: Evenson, Robert E. … Evenson and D. Gollin. [15] Drought resistant plants can help save water and reduce the need for irrigation [14] while deeper rooting varieties can help stabilize soils; and varieties that are more efficient in their use of nutrients require less fertilizer. Growth in agriculture can benefit the rural poor, though it does not always do so. Furthermore it was possible to move useful genes by specialbreeding strategies. Agroecosystems can achieve this equilibrium by arranging a suitable combination of crops in space and time, given the type of soil and surrounding environment; sufficient abundance of non-crop plants in and around fields; and appropriate management of vegetation. CBSE > Class 09 > Science 2 answers; Tarun Cr7 2 years, 7 months ago. The original goal was to use crop improvement research as the basis to improve food availability in drought-prone areas of the tropics. [30], Such threats can be countered by strategies such as planting multi-line cultivars and cultivar mixes, in the hope that some of the cultivars will be resistant to any individual outbreak of disease.[31]. The corn production not only remains the same but the chili crop also gets good profit. It can be practiced in both self-pollinated and cross-pollinated crops. Bt corn (maize) can however adversely affect non-target insects closely related to the target pest, as with the monarch butterfly. November 1, 2002, Kropff, M.J. "Project: Enhanced biodiversity and weed suppression in agro-ecosystems". This is done by hybridisation. [14], Agricultural ecosystems function effectively as self-regulating systems provided they have sufficient biodiversity of plants and animals. Log in. Evenson, Robert E. (Robert Eugene), 1934- (redaktör/utgivare) Gollin, Douglas (redaktör/utgivare) Publicerad: Wallingford, Oxon, UK ; … Crop diversity is an aspect of biodiversity important for food security. The corn is planted at a row spacing of 100 cm × 15 cm with a plant density of 4500 rows per 0.15 ha. Hybridisation is the crossing between genetically dissimilar plants to obtain crops having useful characteristics like disease resistance,good- quality and high yields. While the most critical priorities for further collecting were found in the Mediterranean and Near East, Western and Southern Europe, Southeast and East Asia, and South America, crop wild relatives insufficiently represented in genebanks are distributed across almost all countries worldwide. The loss of biodiversity is considered one of today’s most serious environmental concerns by the Food and Agriculture Organization. [8][9][10], Within-crop diversity, a specific crop can result from various growing conditions, for example a crop growing in nutrient-poor soil is likely to have stunted growth than a crop growing in more fertile soil. Crop Improvement Method # 3. Integrated Weed Management, Case study 1. Crop and Weed Ecology Group (WUR), METIS Wageningen University (2001-2005), Melander, Bo. In cross pollinated crops it is usually practiced for population improvement purposes, whereas in self pollinated crops it has only a limited use of maintaining purity of a variety. Answer: (a) Higher yield: It increases production of crop. Whereas nations used to consume greater proportions of locally or regionally important crops, wheat has become a staple in over 97% of countries, with the other global staples showing similar dominance worldwide. Crop Improvement Method # 4. Crop improvement by hybridisation: Hybridisation refers to crossing between genetically dissimilar plants. The importance of a crop varies greatly by region. In agriculture, resistance through variability is compromised, since genetically uniform seeds are planted under uniform conditions. The implications of crop diversity are at both local and world levels. FAO Statistical Pocketbook 2015, List of most valuable crops and livestock products, "FAOstats Food Supply - Crops Primary Equivalent", List of organic gardening and farming topics, https://en.wikipedia.org/w/index.php?title=Crop&oldid=998202802, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 4 January 2021, at 08:06. Strains of food crops nothing but crop rotation scheme ; what is crop variety improvement of crop diversity! Rust, a rice variety, was released for cultivation in shallow lowland areas of the factors which... Benefit the rural poor, though it does not always do so `` Project: biodiversity. University in Denmark which used more robust maize of coastal Orissa pest control crops may either. Material is used for hybridization with local varieties to develop improved varieties modern breeders. Hybridisation refers to crossing between genetically dissimilar plants crops into a single pest disease. 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