ScienceDirect is an Elsevier database of scientific content from journals and books, which gives comprehensive coverage of all areas of the sciences and social sciences.
Open the ScienceDirect database and try searching for the keywords – "soil color" AND organic matter AND effect* entered as in the example below (AND is a boolean operator and double quotations marks "" are used to search for phrases).
Alternatively, you could try searching for the key concepts you have identified from your own research topic.
Note: You may need to sign in first with your CSU username and password
Charles Sturt University acknowledges the traditional custodians of the lands on which its campuses are located, paying respect to Elders, both past and present, and extend that respect to all First Nations Peoples.
Charles Sturt University is an Australian University, TEQSA Provider Identification: PRV12018. CRICOS Provider: 00005F.