Problem
Variability in crop yields
Other Names:
Variability in grain yields Nature:
Yield variability is determined by variety (genotype), variability and level of inputs (such as fertilizers, irrigation and pesticides), and variability in pests and diseases and in climatic factors (such as rainfall, frosts, and temperature). Interactions between these factors are important, although difficult to analyze. As national food-grain production has increased, especially through the introduction of improved varieties and the increased use of irrigation and fertilizers, so often has variability in yields from year to year. This leads to the perception of increased risk, which may make new technologies appear less attractive to farmers and hence slow agricultural development. It also increases instability in national and world food supplies, which may act to destabilize domestic prices, national income, and the food consumption of the poor, especially in poor agrarian countries. Incidence:
The world's total production of wheat and rice increased linearly by some 150 percent from 1961 to 1993, although some variation occurred. The upward trend is attributed to technological development, and the variation is the result of climatic variability and political instability. Annual fluctuations in wheat production are larger than those for rice. This may indicate that the abundant use of water in rice-growing tempers the variations resulting from climatic fluctuations. Broader Problems:
Instability of production of food and live animals Aggravates:
Insecurity from future crop uncertaintyShortfalls in agricultural crop productionLong-term shortage of cereals and cereal preparations Strategies:
Enriching cultivated plant's genetic diversity with wild relativesExploiting global biological resources for new foodsExpanding research on plant genetic resourcesGrowing grain cropsPredicting variability in crop yieldsStandardizing crop yields Subject(s):
Plant Life → CerealsAgriculture, Fisheries → Crops
Related UN Sustainable Development Goals:
Problem Type:
F: Fuzzy exceptional problems Date of last update
04.10.2020 – 22:48 CEST