Panama disease the Cavendish was then thought to be immune, but was immune only to the strain of the fungus that destroyed the Gros Michel. The version that annihilated the Gros Michel was found in only the Western Hemisphere, but the version found in Malaysian soil was different, and the Cavendish is susceptible to it. It killed and spread faster, inspiring more panic than its earlier counterpart in Panama. The newly discovered strain of "F. oxysporum" was named "tropical race 4 (TR4)". The resulting worldwide collapse in the banana trade is said to have inspired the song "Yes! We Have No Bananas".
Crop residue above-ground plant in the first year. There is some residual benefit of fertilizers as the crops take up a small amount of the nutrients two and three years later. Fertilizer placement can significantly affect the efficiency of crop uptake. The impact of residue placement (buried by tillage or left on the surface in zero tillage) on nutrient cycling and efficiency is under study. Thus, the practice of calculating the fertilizer equivalent value of the nutrients in crop residue is a reasonable guide to estimating the partial value of crop residues. Crop residue There are two types of agricultural crop residues.