[Study on the effect of yield increase and keeping soil moisture under rainfed condition with cotton field covering in winter and spring]

aridoculture cobertura seca contenido de agua en el suelo contenido de materia seca crop yield dry farming dry matter content dry mulches gossypium hiver invierno mulch sec primavera printemps rendement des cultures rendimiento de cultivos soil temperature soil water content spring temperatura del suelo teneur en eau du sol winter